We also learned today police believe there could be up to seven other victims in this case.

We've been following reports of other inappropriate behavior by the 15-year-old boy. We spoke to an outraged father, who says Colon High School administrators failed to protect his daughter.

James Smith says his daughter had to miss several days of school back in May, because she was afraid.

The Colon Schools Superintendent confirms a male student was suspended after being caught in the girls bathroom with a ski mask.

Smith's 14-year-old daughter was there.

"The guy came, was crawling underneath the stall at them and he was wearing a ski mask and the girls were scared to death," he said.

Smith filed a report with the Colon Police Department describing the incident.

Police are releasing very few details about their investigation, because the boy is a juvenile.

Smith says the school did not notify him about the bathroom incident.

"I don't even know how to explain it...I am in shock that the people running this school had no intentions at all to contact me and let me know this had happened," he said.

Police reports show this is the same boy involved in what could be up to seven cases of sexual assault on a school bus--most involving young girls.

Saint Joseph County Prosecutor John McDonough says his office initially charged the bus driver with failure to report, but that charge was dismissed Friday due to a loophole in the law. Mandated reporting is not required for abuse between juveniles.

"Not that we don't feel mistakes were made and that he should have told someone. But unfortunately, that's the way the law is," McDonough said.

In the meantime, the superintendent has been unclear about any punishment the 15-year-old boy has received, only telling Newschannel 3 he is no longer a student at the school.

"The principal, superintendent they should have been public about it and honest; instead they are not public about it, they are not honest about it. They are covering it up," Smith said.

A parent of one of the girls who was assaulted received a letter from the prosecutor's office which was passed along to Newschannel 3. It shows the 15 year old boy in this case is facing juvenile criminal sexual conduct charges.

We have tried repeatedly to get an on camera interview with the superintendent at Colon, but she has refused.